Punching-machine.



No. 773,329. PATENTED OCT. 25, 1904. W. F. LAUTENSOHLAGER 6: E. B. HUME.

PUNUHING MACHINE.

APPLICATION FILED MAR. 21,1904.

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BSHEETS-SHEET 1.

8 3 L u s8 h f. T/ M E a. a a h z 2T w m .7 P d d 1 W -m 8 No. 773,329.PATENTED OCT. 25, 1904. W. F. LAUTENSGHLAGBR & E. B. HUME.

PUNOHING MACHINE.

APPLICATION FILED MAR. 21,1904.

2 SHEETS-SHEET 2.

UNITED STATES Patented October 25, 1904.

PATENT OFFICE.

OHIO.

PUNCHING-MACHINE.

SPECIFICATION forming part of Letters Patent No. 773,329, dated October25, 1904.

Application filed March 21,1904. Tierial No. 199,309. (No model.) i

To all whom it may concern.-

Be it known that we, VVILLIAM F. LAUTEN- SOHLAGER and EDGAR B. HUME,citizens of the United States, and residents of Cincinnati, in thecounty of Hamilton and State of Ohio, have jointly invented certain newand useful Improvements in Punching-Machines, of which the following isa specification.

Our invention relates to punching-machines especially adapted forproviding the ornamental punching on boot orshoe uppers, harness,saddlery goods, or the like, and has for its object the providing in amachine of-this character of novel punch and novel manner of making,setting, and manipulating the same, and the invention will be readilyunderstood from the following description and claims and from thedrawings, in which latter- Figure l isaside elevation of our improveddevice partly broken away. Fig. 2 is a detail in perspective of thepressure-foot. Fig. 3 is a cross-section on the line a: w of Fig. 1,illustrating the cam mechanism for reciprocating the punch up and down.Fig. 4 is a cross-section on the line y y of Fig. 1, illustrating thecam mechanism for transversely feeding the punch. Fig. 5 is across-section on the line 2 .2 of Fig. l, showinga rear View of thepunch-ram and punch-ram head. Fig; 6 is a plan detail of the mechanismfor automatically returning the punch-shank to initial position. Fig. 7is a longitudinal central section of the punch-ram. Fig. 8 is abottomview of the punch-ram with the punch therein; and Fig. 9 is a diagramview illustrating two successive punchings of a punch, the middle of thepunching part of which coincides with its rocking axis. Fig. 10 is adiagram view illustrating two successive punchings of our improveddevice in which one end of the punching part of the punch coincides withthe rocking axis of the punch. Fig. llis a central longitudinal sectionillustrating the connection between the punchhead, bushing, and punch.Fig. 12illustrates a plan view of a piece of stock punched with ourimproved device. Fig. 13 is a side elevation, partly in section, showingthe punch ccccntrically mounted on the punch-head.

A represents the frame of the machine.

B is the driving-shaft, having on it a cam C for operating the punch-ramD up and down and a cam E for reciprocating the punch-ram head F. Thecam C haseccentric faces 0 0 and concentric faces 0 0 adapted to engagethe contact-faces g g of a block G, the block having a shank 9 on whichthere is a rack g engaging a sector it (which may also be a pinion) onrock-shaft H, mounted in bearings in the frame of the machine, andhaving a crank it and crank-pin 76 which latter engages a slide 1,sliding in guideway 61 of the punch-ram. This guideway is preferably inacollar cl, adjustably clamped to the punch-ram, as by means of aclampingbolt d It has a sideward extension 6?, sliding'in guideway f ofthe punch-ram head for relieving strain on the punch-ram. The rack g isheld to its pinion it bya guide 9*, secured to the frame. When the cam Cis turned, the faces thereon engage with the faces of the block G andthrough the mechanism just described reciprocate the punch-ram up anddown.

The cam E has eccentric faces 6 e and concentric faces 6 0 arranged toengage contactfaces is k of a block K, secured to a rockshaft L, whichhas on it an arm M, in which there is a slot m, a stud m beingadjustably secured in the slot. A link N is articulated with the studand with a sector 0, rocking loosely upon the rock-shaft H, the sectorengaging a sector 0 on' a rock-shaft P, on which there is a sector 12,engaging a rack f on the punch-ram head F. The sectors p and 19' may bein the form of pinions or sectors. The

punch -ram head is arranged to slide sidewardly .on VbarsfiR, projectingfrom the frame. Through the mechanism just described the.

camEiir 'lpartsa sidewise reciprocation to the punch-ram head.

The cams C and E act alternately for alternately raising and loweringthe punch and. re ciprocating the punch-ram head sidewardly. The stud mis adapted to be adjustably secured along the arm M for varying thelength of sidewise stroke of the punch-ram head. If the longitudinalaxis of the pivotal connection between the stud m and the link N iscoincident with the longitudinal axis of the rockshaft L, the sidewisereciprocation of the punch-ram head is neutral. The farther the stud 'm'is moved along the arm M away from the rock-shaft L the longer will bethe sidewise stroke of the punch-ram head.

S is a pressure-foot, the shank s of which is slidable in bearings s inthe frame and arranged to be elevated by a finger s on the rock-shaft H,the finger taking against a tappet s", adjustably clamped on thepressurefoot shank by a bolt a a spring s, taking against the bearing sand against a tappet s on the shank of the pressure-foot, yieldinglyholding the pressure-foot downwardly.

T is a lever pivoted at 25 to the frame. One end thereof takes under thetappet s. lever has the purpose of raising the pressurefoot by hand.

U is a gage against which the operator guides the stock in feeding thesame through the machine, the gage being adjustable, as by having a bolta take through a slot "21/ in the gage and into the frame.

Our improvement contemplates an im proved manner of making and settingthe punch. The punch-ram comprises a casing 1, movable up and down inbearings 2 3 in the punch-ram head. 4: is a punch-ram shank having apunch-head 5, provided with a socket 6 for receiving the punch 14. Thissocket is preferably made of frusto-conical shape, and the punch-headhas means thereon for positioning the punch so that the punching partthereof shall normally extend in a line coincident with the direction ofthe stroke of the punch-ram head, as by having cheeks 7 8, which takeagainst flattened sides 9 10 on the punch. If it is desired to use areduced size of punch, a bushing 11 is arranged to be placed in thesocket. thereby practically forming part of the punch-head, the bushingbeing provided with a socket 12, adapted to receive a smaller size ofpunch 13, the bushing itself being provided with checks 15 16, adaptedto take against the flattened sides 9 10 of the smaller punch. Thepunch-head is provided with an offset 17 and the bushing with an offset18 between the conical face of the socket and the inner face of thecheek, because in practice the bushing or punch receives its seat byhaving the conical outer face of the punch or bushing take against andbeing wedged within the conical inner face of the head or bushing, theoffset providing clearance for permitting the firm seating of thebushing or punch and side contact between the cheeks and flattenedsides.

Means are provided for permitting rocking of the punch-shank withrelation to its casing during operation. Thus ball-bearings 19 20 areprovided between the casing and punchshank, the threaded runway 21 beingadjustable on the threaded end 22 of the shank for adjustment of theball-bearings, a lock-nut 28 This l holding the parts in place. Inoperation the punch-ram is alternately reciprocated up and down and thepunch-ram head alternately reciprocated back and forth. Thus the stockor material to be operated upon (represented by V) is placed under thepunch against the gage U, the pressure-foot being manually raised forpermitting this, the pressure-foot on re lease descending on the stock.The punch then descends and pierces the material, the shank-axis andfoot of gage U being then preferably side by side. This descent iscaused by the crank-pin 1L rocking downwardly until it is under thelongitudinal axis of the rockshaft H, which forces the punch to itslowermost position, the rocking continuing until the crank-pin slightlypasses beyond the position under the longitudinal axis of the rockshaft,thereby rising slightly and relieving the pressure of the punch upon thetable and permitting traversing of the punch while still embedded in thematerial. The machine then traverses the punch-ram head while the punchis still in the material, thereby feeding the material, thepressure-foot having meanwhile been raised in the operation of themachine. The pressure foot then descends, and the punch-ram after againreaching its lowermost position rises and is retraversed to initialposition and then again descends into the material, the apparatusconstituting a punchfeeding punching-machine. hen feeding a piece ofstock having a curved edge (see the edge 4 Fig. 12,)the punch is turnedor rocked because the operator causes the curved edge to follow alongthe gage U, which results in sideward shifting of the stock while beingfed. and the punching-tubes being embedded in the stock while being fedresults in turningor rocking of the punch about its axis while the stockis being fed. In order to automatically rock the punch back to initialposition for each stroke after being thus manually rocked, thepunch-shank is provided with a \I-shaped recess 2a, the walls of whichare arranged to take against a correspondingly-shaped finger 25, theshank Q6 of which is mounted in a bracket 27, secured to the frame, aspring 28 taking between the end of the shank and the bracket andyieldingly holding the finger in position, a pin 29 on the finger takingagainst the endwall of aslot 30 for limiting outward movement of thefinger. The punch-shan k is further provided with lugs 31 32, adapted tostrike a lug 33, secured to the punch-ram head for preventing overthrowof the shank in rocking, thereby insuring the meeting of the inclinedfaces of the finger and recess at each stroke.

It has been the usual practice heretofore in employing non-rockingpunches to construct the punch with the longitudinal axis of thecollective tubes comprising the punching part of the punch coincidingsubstantially with the longitudinal axis of the punch. We have provideda new and improved punch in which ings 39 40 are represented.

the master or initial punch-tube corresponds l provided also in thisinstance with cheeks at substantially withthe longitudinal axis of thepunch-that is to say, in our improved device one end of the punchingpart of the punch coincides substantially with the longitudinal orrocking axis of the punch-shank. The result is that in employing arocking punch and punching in curves the punch-holes of consecutivepunchings follow in continuous and uninterrupted manner around thecurves, thus illustrating the old-style punch when employed in ourimproved device, and referring to Fig. 9, 34 35 represent twoconsecutive punchings by the punch. The dotted arrowed line w representsthe direction of transverse travel of the punch ram head, which alsocoincides with the direction of feed by the machine of the stock. Thecrosses as :1 represent the middle of the punching part of twoconsecutive punchings of the punch. 36 represents the master or initialtube or heel of the punching part of the punch. The feeding stroke isrepresented by the distance from a" to 00 When the punch is manuallyturned during reciprocation of the punch-ram head, the axis ofoscillation being coincident with the middle of the punching part of thepunchnamely, n0 a0 -the heel 36 of said punching part is swervedto oneside and the toe 37 of said punching part is swerved to the other sideof said line of travel, (represented by the arrowed line 10, as see thepunching 34,) causing the heel and toe of successive punchings to benon-adjacent. In order to obviate this difficulty, we have provided ourimproved punch and manner of mounting same, the operation of which isrepresented in Fig. 10, in which two consecutive punch- In our improvedpunch the master or initial tube or heel 36 is coincident with thelongitudinal axis of the punch, causing the punching part of the punchto swing upon its heel, which coincides substantially with thelongitudinal axis 00 c of the punch shank or ram, so that the master orinitial tube or heel of a preceding punching will always besubstantially in line with the line of travel of the punch-ram head,(see dotted line 10,) the punching part of the punch swinging from oneend namely, the heel 36 and causing the major part or toe 37 of thepunching part of the punch to swing away from the line of travel of thepunch, the travel of the punch being represented by the distance from :0m and causing the heel and toe of immediately-succeeding punchings to beadjacent. (See Figs. 10 and 12.)

If desired, the socket for the punch may be eccentrically placed in thehead, as shownby the socket 6 in the head 5, Fig. 13, the master orinitial tube or heel 36that is, one end of the punching part of thepunchbeing substantially coincident with the rocking axis of thepunch-head, which axis is represented by the dotted line :0. The head ispreferably the side of thesocket similar to the cheeks 7 8, as see thecheek 7, the punch being provided with faces for engagement therewithsimilar to the faces 9 10, offsetsimilar to the offset 17 being alsoprovided between the cheeks and faces. The head 5 is provided with anundercut 48, forming an eccentric reduced end for the head, the undercutalso bringing the punching part of the punch into better view of theoperator and permitting closer work of the operator to the punch infeeding the stock.

The table 38 of the machine has a screwthreaded pedestal 4l passingloosely through a flange 42 of the frame, the flange having at top andbottom thereof, respectively, threaded collars 43 44, taking about thethreaded pedestal for raising and lowering the table, the collarsclamping against the flange for firm positioning of the table. A stem 45on the frame takes into a socket 46 on the table for preventing turningof the latter. The table may be provided with an adjustablecontact-plate 47 for receiving the thrust of the punch.

Having thus fully described our invention, what we claim as new, anddesire to secure by Letters Patent, is-

1. In combination, a rockable and automatically-rerocking punch for apuncl1feeding punching-machine having its forward punching partsubstantially coincident with its rock'- ing axis.

2. The combinatiomin a punching-machine, of a rockable andautomatically-rerocking punch having its master or initial punching partsubstantially coincident with its rocking axis and its major punchingpart to one side of said axis.

3. In combination, a rockable punch for a punch-feeding punching-machinehaving its forward punching part substantially coincident with itsrocking axis and the major part of its punching part in rear of saidaxis and means automatically rerocking said punch during operation.

4. In a punching-machine, the combination ing its major punching part toone side of its rocking axis.

5. In combination, a rockable punch for a punching-machine, having oneend of its punching part substantially coincident with its rocking axis,and means automatically rocking said punch to initial position for eachpunching stroke of the punch, substantially rocking said shank toinitial position for each punching stroke of the punch.

T. The combination, in a p unching-machine, of a punch-ram, a punch-headrockable thereon, means automatically rerocking said p unchhead, and apunch on said head having one end of its punching part substantiallycoincident with the axis on which said head rocks.

8. Thecombinatiomin a punching-machine, of a punch-ram, a punch-headrockable thereon, means automatically rerocking said punchhead, and apunch on said head having one end of its punching part substantiallycoincident with the axis on which said head rocks, said head and punchhaving engaging means for definitely positioning the punching part ofsaid punch with relation to said head.

9. In a punching-machine, the combination of a punch-ram, a punch-shank,a punch for the shank having the major part of its punching part to oneside of the longitudinal axis of said shank, and means automaticallyalternately disconnecting and connecting said punch-shank for permittingrocking and causing return of said punch to original position.

10. In a punching-machine, the com bi nation of a punch-ram, apunch-shank, a punch for said shank having the longitudinal axis of oneend of its punching part substantially coincident with thelongitudinalaxis of said shank, means between said punch-shank and punchrampermitting said shank to rock during operation, and means automaticallyreturning the punch to original position.

11. .In a pu nching-n'iach ine, the combination of a punch-head, a punchtherefor, means permitting said punch head to be manually rocked, meansautomatically rocking said punch-head to initial position, one end ofthe punching part of said punch being substantially coincident with theaxis on which said punch-head rocks.

12. In a punching-machine, the combination of a punch-head, a punchtherefor, means permitting said punch head to be manually rocked, meanslimiting the manual rocking of said punch-head, means automaticallyrocking said punch-head to initial position, one end of the punchingpart of said punch being substantially coincident with the axis on whichsaid punch-head rocks.

13. The combination, in a punch-feeding punching-machine, of a punch-ramhead, a punch-ram, means for alternately reciprocating said punch-ramhead and punch-ram, a

punch-shank, means permitting said punchshank to be rocked duringoperation, means I automatically rerocking said punch shank duringoperation, and a punch having a punching part one end of which issubstantially coincident with the axis on which said shank rocks,substantially as described.

14. The combination, in a punch-feeding punching-machine, of a punch-ramhead, a punch-ram, means for alternately reciprocatmg said punch-ramhead and punch-ram, a punch-shank, means permitting said punchshank tobe manually rocked, means automatically rerocking said punch-shank toinitial position, and a punch having a punching part one end of which issubstantially coincident with the axis on which said shank rocks,substantially as described.

15. The combination, in a punch-feeding punching-machine, of a punch-ramhead, a punch-ram, means for alternately reciproeating said punch-ramhead and punch-ram, a punch-shank, means permitting said punchshank tobe manually rocked, means limiting the manual rocking of said shank,means antomatically rerocking said p unch-shank to initial position, anda punch having a punching part one end of which is substantially coincident with the axis on which said shank rocks, substantially asdescribed.

16. The combination, in a punching-machine, of a table, a rockablepunch-shank, means for traversing said punch-shank above said table, apunch for said shank having one end of its punching part substantiallycoincident with the longitudinal axis of said shank, said shank andpunch having means for definitely positioning said punch with relationto said shank with its punching part normally extending in line with thedirection of said traversing and With one end of its punching partsubstantially coincident with the longitudinal axis of said shank, meanspermitting said punch-shank to be manually rocked, and meansautomatically rerocking said shank, substantially as described.

17. The combination, in a punching-machine, of a table, a rockablepunch-shank, means for reciprocating said shank across said table, apunch having a punching part normally extending in the plane of saidreciprocation and having one end of said punching part substantiallycoincident with the longitudinal axis of said shank, said shank andpunch having means for positioning said punch with relation to saidpunch-shank with its punching part extending in said plane and one endof its punching part substantially coincident with the longitudinal axisof said shank, means permitting said punclrshank to be manually rocked,and means automatically rerocking said shank, substantially asdescribed.

18. The combination, in a punching-machine, of a rockable punch-shank, apunch thereon having one end of its punching part substantiallycoincident with the longitudinal axis of said shank, said shank andpunch collectively having inclined seating-faces and a cheek andengaging face for the check for positioning the punch with relation tothe l punch-shank.-

19. The combination, in a punching-mal chine, of a rockable punch-shank,a punch l thereon having one end of its punching part substantiallycoincident with the longitudinal axis of said shank, said shank andpunch having inclined seating-faces, said shank having cheeks and saidpunch having engaging faces therefor for positioning the punch withrelation to the punch-shank.

20. The combination, in a punching-machine, of a rockable punch-shank, apunch therefor having one end of its punching part substantiallycoincident with the longitudinal axis of said shank, said shank having afrustoconical socket for said punch, said punch having a frusto-conicalshank for insertion in said socket, said shank having a cheek and saidpunch having an engaging face for said cheek, said shank also having anoffset between said frusto conical socket and said cheek, substantiallyas described.

21. The combination, in a punching-niachine, of a table, a punch-ram, apunch-head rockable thereon, means reciprocating said punch-head acrosssaid table, a bushing in said head, a punch in said bushing, said punchhaving a punching part normally extending in the direction of saidreciprocation and one end of which is substantially coincident with theaxis on which said head rocks, said head, bushing and punch havingengaging means for definitely positioning said punch with relation tosaid punch-head with its punching part normally extending in thedirection of said reciprocation and said one end thereof substantiallycoincident with the axis on which said head rocks.

22. In a punch-feeding punching-machine, the combination of a rockableand automatically-rerocking feeding-punch whose rocking axis is at theheel of its punching part for throwing the toe of said punching partwhen rocked out of the line of direction of feeding travel of said punchfor causing the toe of successive punchings to be adjacent the heel ofpreceding punchings.

23. In a punch-feeding punching-machine, the combination of a rockableand automatically-rerocking feeding-punch whose rocking axis is at oneend of its punching part for causing the forward end and the rear end ofsuccessive punchings to be adjacent to each other after rocking of saidpunch.

24:. In combination, in a punching-machine, a manually-lockable andautomatically-rerocking punch-head having a reduced eccentric end forthe punch.

25. In combination, in apunching-machine,

a manually-rockable and automatically-rerocking punch-head having aneccentricallyplaced socket for the punch.

26. In combination, in a punch feeding punching-machine, a rockablepunch having one end of its punching part substantially coincident withits rocking axis, means permitting rocking of said punch by the stockbeing fed, and means automatically rerocking said punch, substantiallyas described.

In testimony whereof We have signed our names hereto in the presence oftwo subscribing witnesses.

WILLIAM F. LAUTENSOHLAGER. EDGAR B. HUME.

